farwell



F. OQPA'RWELL.

STOVE BACK.

(No Model.)

Patented Juiy 11, v1893 Fifi 7% imam w M a NITED STATES- ATENT Fries.

FAY O. FARIVELL, OF DUBUQUE, IOWA, ASSIGNOR OF ONE-HALF TO THE ADAMSCOMPANY, OF SAME PLACE.

STOVE-BAG K.

SPECIFICATION forming part of Letters Patent No. 501,412, dated July 11,1893.

(No model.)

To all whom it may concern:

Be it known thatI, FAYO. FARWELL, acitizen of the United States,residing at Dubuque, in the county of Dubuque and State of Iowa, haveinvented certain new and useful Improvements in Stove-Backs; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, which will enable others skilled in the art to whichit appertains to make and use the same.

, My invention relates to an improved form of hacks for stoves and is ofthe kind known as extension backs, to be used in connection withdifferent sizes of stoves.

The advantage which I seek to obtain in my improved device is to producea back which may be used in connection with stoves possessing differentsized openings to which the backs are to be applied.

A further advantage of my device consists of producing an extension backwhich may be enlarged or reduced and kept in position entirely byfriction and without the use of bolts, screws, wedges and lugs.

In many other extension backs, where the upper edges project over theoven plate, there is always a space between the oven plate and theprojecting edge of the main body of the back and the sections of itswings, through which space ashes, &c., sift between the oven plate andthe stove back. To avoid this, I so construct the upper edge of the backthat it will present a straight smooth edge along the entire length ofthe back and its extensions, which rest upon the oven plate, forming anash tight joint and thus preventing the ashes from sifting in betweenthe fire box and the oven plate.

My invention consists generally in the employment of a main back platehaving a flange adapted to fit over the oven plate. The extensions areadapted to be applied upon the ends of this main'plate and to be securedto this main plate by suitable flanges adapted to engage with the flangeof the main plate with considerable friction, thus securing the sidepieces in any position desired in relation to the main plate. Additionalpieces are secured by mortises and tenons to the side pieces adapted toslide up and down to increase or diminish the depth of the back. Thesebottom pieces are also held inplace by friction between themselves andthe side plates and the main body.

For a better comprehension of my invention, attention is directed to theaccompanying drawings, forming a part of this specification, and inwhich- Figure 1 is a side elevation of my improved device with the sideand bottom plates extended to the fullest extent. Fig.2 is an elevationof the side plates. Fig. 3 is an elevation of one of the bottom plates.Fig. 4 is a section taken on the line 00-30 of Fig. 1. Fig. 5 is asection taken on the line yy of Fig. 1 and Fig. 6 is the same with theplates separated.

In all of the aboveviews like parts are designated by the same lettersof reference.

The main plate of the device, A, is of ageneral rectangular shape and isprovided with a flange E which is adapted to set upon the oven plate ofthe stove when the device is attached and is in operation. The peculiarconstruction of this flange will effectively prevent the ingress ofashes and similar substances between the oven plate and the fire box, aswill more fully hereinafter appear.

B and O are the side pieces and are secured in the rear of the mainpiece A by means of suitable flanges H, H engaging with the flange E ofthe main plate. The flange H is secured to the pieces 0 and B at aslightly different angle as shown in Fig. 6, than the flange E issecured to the plate A. The flange H being outside of the part G willform, by means of the small flange F, the plate B or G into engagementwith the plate A, thus securing the plate B or O in any position. Theplates B and O are provided on their inner edges with suitable tenonswhich engage with mortises J, J of the plates B and C which form thelower extension of the back. It will be noticed that when the wings Band O are in position with their flangesH, H outside of the part 0 ofthe flange E, the lower end of the small flange F will be parallel withtheinner face of the flange H, thus presenting a straight smooth edge ofthe entire length of the back and the side extensions which project overto rest upon the oven plate, forming a tight joint and preventing allashes, &o., from sifting between the Oven plate and the fire box.

It will be seen that my device is very simple in construction, will fitstoves of any size, requiring no nuts, bolts, keys or lugs to hold it inposition, but all of the parts are held in any required position solelyby friction upon each other.

Having now described my invention, What I claim as new therein, anddesire to secure by Letters Patent, is

An extension back for fire boxes for stoves,

